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If X={4^(n)-3n-1:n in N} and {9(n-1):n i...

If `X={4^(n)-3n-1:n in N} and {9(n-1):n in N}`, the prove that `X sub Y`.

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To prove that \( X \subset Y \), we need to show that every element of set \( X \) is also an element of set \( Y \). ### Step 1: Define the sets We have: - \( X = \{ 4^n - 3n - 1 : n \in \mathbb{N} \} \) - \( Y = \{ 9(n - 1) : n \in \mathbb{N} \} \) ...
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